DE102005001685A1 - System and method for generating white light using LEDs - Google Patents
System and method for generating white light using LEDs Download PDFInfo
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- DE102005001685A1 DE102005001685A1 DE200510001685 DE102005001685A DE102005001685A1 DE 102005001685 A1 DE102005001685 A1 DE 102005001685A1 DE 200510001685 DE200510001685 DE 200510001685 DE 102005001685 A DE102005001685 A DE 102005001685A DE 102005001685 A1 DE102005001685 A1 DE 102005001685A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
- H05B45/22—Controlling the colour of the light using optical feedback
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133624—Illuminating devices characterised by their spectral emissions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
Abstract
Ein System und ein Verfahren zum Erzeugen weißen Lichts umfassen ein Verwenden einer Kombination von weißen, roten, grünen und blauen LEDs, um weißes Licht zu erzeugen, und ein Einstellen des emittierten Lichts, ansprechend auf Rückkopplungssignale. Ein Lichtsystem weist eine Lichtquelle auf, die zumindest eine weiße LED und mehrere Farb-LEDs und ein Spektralrückkopplungssteuersystem aufweist, das konfiguriert ist, um Licht zu erfassen, das von der Lichtquelle ausgegeben wird, und um das Licht, das von der Lichtquelle ausgegeben wird, ansprechend auf die Lichterfassung einzustellen. Das Spektralrückkopplungssteuersystem kann einen Farbsensor, der konfiguriert ist, um farbspezifische Rückkopplungssignale zu liefern, eine Steuerung, die konfiguriert ist, um farbspezifische Steuersignale ansprechend auf die farbspezifischen Rückkopplungssignale zu erzeugen, und einen Treiber umfassen, der konfiguriert ist, um farbspezifische Treibersignale ansprechend auf die farbspezifischen Steuersignale zu erzeugen.One The system and method for generating white light include using a combination of white, red, green and blue LEDs to white Generating light, and adjusting the emitted light, responsive on feedback signals. One Lighting system has a light source, the at least one white LED and comprising a plurality of color LEDs and a spectral feedback control system, which is configured to detect light coming from the light source is output, and the light emitted by the light source will adjust in response to the light detection. The spectral feedback control system Can be a color sensor that is configured to color-specific Feedback signals to provide a controller that is configured to color-specific Control signals in response to the color-specific feedback signals and include a driver configured to color-specific driver signals in response to the color-specific control signals to create.
Description
Licht emittierende Dioden (LEDs) sind normalerweise monochromatische Halbleiterlichtquellen und sind derzeit in verschiedenen Farben von UV-Blau bis Grün, Gelb und Rot erhältlich. Viele Beleuchtungsanwendungen, wie z. B. eine Gegenlichtbeleuchtung für Flüssigkristallanzeige- (LCD-) Schirme, benötigen Weißlichtquellen. Zwei gängige Lösungsansätze zum Erzeugen weißen Lichts unter Verwendung monochromatischer LEDs umfassen (1) ein Zusammenpacken einzelner roter, grüner und blauer LEDs und ein Kombinieren des Lichts, das von diesen LEDs emittiert wird, um weißes Licht zu erzeugen, und (2) ein Einbringen von fluoreszierendem Material in eine UV-, blaue oder grüne LED, so dass ein Teil des ursprünglichen Lichts, das durch den Halbleiterchip der LED emittiert wird, in Licht längerer Wellenlänge umgewandelt wird, und ein Kombinieren des Lichts längerer Wellenlänge mit dem ursprünglichen UV-, blauen oder grünen Licht, um weißes Licht zu erzeugen. LEDs, die unter Verwendung des zweiten Lösungsansatzes hergestellt sind, verwenden oft ein phosphorbasiertes fluoreszierendes Material und werden als weiße Phosphorumwandlungs-LEDs bezeichnet.light emissive diodes (LEDs) are usually monochromatic semiconductor light sources and are currently available in different colors from UV blue to green, yellow and red available. Many lighting applications, such as B. a backlight for liquid crystal display (LCD) screens, need White light sources. Two common Possible solutions to Generate white Light using monochromatic LEDs include (1) a Wrapping up individual red, green and blue LEDs and one Combine the light emitted by these LEDs with white light and (2) incorporation of fluorescent material in a UV, blue or green LED, so that part of the original Light emitted by the semiconductor chip of the LED, in Light of longer wavelength converted and combining the longer wavelength light the original one UV, blue or green Light, to white To generate light. LEDs using the second approach often use a phosphor-based fluorescent Material and are called white Phosphor conversion LEDs called.
Weißes Licht, das durch eine Kombination von roten, grünen und blauen LEDs erzeugt wird, weist eine breite Farbpalette auf, hat jedoch im Allgemeinen einen schlechten Farbwiedergabeindex (CRI). Obwohl die Farbpalette dieses Typs von Weißlichtquelle breit ist, benötigt die Lichtquelle eine komplexere Treiberschaltungsanordnung als eine weiße Phosphorumwandlungs-LED, da die roten, grünen und blauen LEDs Halbleiterchips umfassen, die unterschiedliche Betriebsspannungsanforderungen aufweisen. Zusätzlich zu den unterschiedlichen Betriebsspannungsanforderungen verschlechtern sich die roten, grünen und blauen LEDs unter schiedlich im Lauf ihrer Betriebslebensdauer, was eine Farbsteuerung über einen längeren Zeitraum schwierig machen kann.White light, which is generated by a combination of red, green and blue LEDs is, has a broad color palette but generally has a poor color rendering index (CRI). Although the color palette this type of white light source is wide, needed the light source has a more complex driver circuitry than one white phosphor conversion LED, because the red, green and blue LEDs comprise semiconductor chips having different operating voltage requirements. additionally to deteriorate to different operating voltage requirements the red, green and blue LEDs differently over their service life, what about a color control over a longer one Difficult period.
Weiße Phosphorumwandlungs-LEDs benötigen nur einen einzigen Typ von monochromatischer LED, um weißes Licht zu erzeugen, und alle weißen LEDs einer Mehr-LED-Lichtquelle können mit der gleichen Betriebsspannung getrieben werden. Ein Nachteil von weißen Phosphorumwandlungs-LEDs besteht darin, dass ihre spektrale Leistungsverteilung (SPD) nicht gleichmäßig ist. Dieser Nachteil führt zu einem relativ schlechten Farbwiedergabeindex (CRI). Zusätzlich neigt die Farbe, die durch weiße Phosphorumwandlungs-LEDs erzeugt wird, dazu, im Laufe der Betriebslebensdauer und bei Veränderungen von Bedingungen von ihrem ursprünglichen Wert abzuweichen.White phosphor conversion LEDs need only a single type of monochromatic LED to white light to generate, and all white LEDs a multi-LED light source can be driven with the same operating voltage. A disadvantage of white Phosphor conversion LEDs is that their spectral power distribution (SPD) is not even. This disadvantage leads to a relatively poor color rendering index (CRI). In addition, it tends the color, which is white Phosphor conversion LEDs is produced, in the course of the service life and with changes of conditions from their original value departing.
Eine Weißlichtquelle wird benötigt, die einen hohen CRI und eine breite Farbpalette aufweist, die über der Zeit ein konstantes weißes Licht erzeugen kann.A White light source is required, which has a high CRI and a wide color gamut that exceeds the Time a constant white Can generate light.
Es ist die Aufgabe der vorliegenden Erfindung, ein Lichtsystem und ein Verfahren zum Betreiben eines Lichtsystems mit verbesserten Charakteristika zu schaffen.It The object of the present invention is a lighting system and a method of operating a lighting system with improved To create characteristics.
Diese Aufgabe wird durch ein Lichtsystem gemäß Anspruch 1 oder 15 sowie ein Verfahren gemäß Anspruch 11 gelöst.These The object is achieved by a lighting system according to claim 1 or 15 as well a method according to claim 11 solved.
Ein System und ein Verfahren zum Erzeugen weißen Lichts umfasst ein Verwenden einer Kombination von weißen, roten, grünen und blauen LEDs, um weißes Licht zu erzeugen, und ein Einstellen des emittierten Lichts ansprechend auf Rückkopplungssignale. Bei den weißen LEDs handelt es sich normalerweise um weiße Phosphorumwandlungs-LEDs. Das Erzeugen weißen Lichts unter Verwendung einer Kombination von weißen Phosphorumwandlungs-, roten, grünen und blauen LEDs erzeugt weißes Licht mit einem verbesserten CRI und einer breiten SPD. Das Einstellen des emittierten Lichts anspre chend auf eine Rückkopplung ermöglicht, dass Luminanz- und Chrominanzcharakteristika des weißen Lichts gesteuert werden, wenn sich die Leistung der LEDs im Laufe der Zeit ändert.One The system and method for generating white light includes using a combination of white, red, green and blue LEDs to white Producing light and responding to adjusting the emitted light on feedback signals. With the white ones LEDs are usually white phosphor conversion LEDs. The Generate white Using a combination of white phosphorus conversion, red, green and blue LEDs produces white Light with an improved CRI and a wide SPD. The setting the emitted light in response to a feedback allows controlling the luminance and chrominance characteristics of the white light when the power of the LEDs changes over time.
Ein Lichtsystem gemäß der Erfindung weist eine Lichtquelle auf, die zumindest eine weiße LED und mehrere Farb-LEDs und ein Spektralrückkopplungssteuersystem umfasst, das konfiguriert ist, um Licht zu erfassen, das von der Lichtquelle ausgegeben wird, und um das Licht, das von der Lichtquelle ausgegeben wird, ansprechend auf die Lichterfassung einzustellen. Das Spektralrückkopplungssteuersystem kann einen Farbsensor, der konfiguriert ist, um farbspezifische Rückkopplungssignale zu liefern, eine Steuerung, die konfiguriert ist, um ansprechend auf die farbspezifischen Rückkopplungssignale farbspezifische Steuersignale zu erzeugen, und einen Treiber umfassen, der konfiguriert ist, um farbspezifische Treibersignale ansprechend auf die farbspezifischen Steuersignale zu erzeugen.One Lighting system according to the invention has a light source, the at least one white LED and comprising a plurality of color LEDs and a spectral feedback control system, which is configured to detect light coming from the light source is output, and the light emitted by the light source will adjust in response to the light detection. The spectral feedback control system Can be a color sensor that is configured to color-specific Feedback signals to deliver a controller that is configured to be responsive the color-specific feedback signals to generate color-specific control signals, and include a driver, configured to respond to color-specific driver signals to generate the color-specific control signals.
Ein Verfahren zum Betreiben eines Lichtsystems gemäß der Erfindung umfasst ein Liefern von Treibersignalen an eine Lichtquelle, die zumindest eine weiße Phosphorumwandlungs-LED und mehrere Farb-LEDs umfasst, ein Erfassen des Lichts, das ansprechend auf die Treibersignale erzeugt wird, ein Erzeugen von Rückkopplungssignalen ansprechend auf das erfasste Licht und ein Einstellen der Treibersignale, die an die Lichtquelle geliefert werden. Farbspezifische Rückkopplungssignale werden von dem erfassten Licht erzeugt. Die farbspezifischen Rückkopplungssignale werden verwendet, um die Treibersignale für die Farb-LEDs auf einer Pro-Farbe-Basis einzustellen, um Luminanz- und Chrominanzcharakteristika des erfassten Lichts aufrechtzuerhalten.A method of operating a light system according to the invention comprises providing drive signals to a light source comprising at least one white phosphor conversion LED and a plurality of color LEDs, detecting the light generated in response to the drive signals, responsively generating feedback signals on the detected light and adjusting the driving signals supplied to the light source. Color specific feedback signals are generated by the detected light. The color-specific reverse Coupling signals are used to adjust the drive signals for the color LEDs on a per-color basis to maintain luminance and chrominance characteristics of the detected light.
Andere Aspekte und Vorteile der vorliegenden Erfindung werden aus der folgenden detaillierten Beschreibung zusammen mit den beiliegenden Zeichnungen, die als Beispiel der Prinzipien der Erfindung veranschaulicht sind, ersichtlich. Es zeigen:Other Aspects and advantages of the present invention will become apparent from the following detailed description together with the accompanying drawings, which are illustrated as an example of the principles of the invention, seen. Show it:
In der gesamten Beschreibung können ähnliche Bezugszeichen verwendet sein, um ähnliche Elemente zu identifizieren.In the entire description may be similar Reference numerals may be used to identify similar elements.
Die
Lichtquelle
Bei
dem Ausführungsbeispiel
von
Die
weißen
LEDs
Obwohl
in der Lichtquelle
Um
zu
Die
Steuerung
Der
Treiber
Die farbspezifischen Treiber ermöglichen es, dass der Treiber die Farb-LEDs auf einer Pro-Farbe-Basis steuert.The enable color-specific drivers that the driver controls the color LEDs on a per-color basis.
In
Betrieb misst das Spektralrückkopplungssteuersystem
Die
farbspezifischen Steuersignale, die durch die Steuerung
Der
Prozess des Lieferns von Treibersignalen, des Erfassens des sich
ergebenden Lichts, des Erzeugens von Rückkopplungssignalen und des
Einstellens der Treibersignale ansprechend auf die Rückkopplungssignale
ist ein kontinuierlicher Prozess. Aufgrund der Rückkopplungsbeschaffenheit des
Prozesses können
Anpassungen der Treibersignale kontinuierlich auf einer Pro-Farbe-Basis
vorgenommen werden, um die gewünschten
Luminanz- und Chrominanzcharakteristika des weißen Lichts aufrechtzuerhalten,
obwohl das Licht, das von der Lichtquelle
Zu
Beispielszwecken ist das System
Die relative spektrale Leistungsverteilung P8 ist die spektrale Leistung pro Konstantintervallwellenlänge über das gesamte Spektrum relativ zu einem festen Referenzwert. Die CIE-Farbanpassungsfunktionen x8, y8 und z8 sind die Funktionen x(8) , y(8) und z(8) bei dem CIE-1931 farbmetrischen Standardsystem oder die Funktionen x10(8), y10(8) und z10(8) bei dem CIE-1964 ergänzenden farbmetrischen Standardsystem. Der CIE-1931 farbmetrische Standardbeobachter ist ein idealer Beobachter, dessen Farbanpassungseigen schaften den CIE-Farbanpassungsfunktionen zwischen 1°- und 4°-Feldern entsprechen, und der CIE-1964 farbmetrische Standardbeobachter ist ein idealer Beobachter, dessen Farbanpassungseigenschaften den CIE-Farbanpassungsfunktionen für Feldgrößen, die größer als 4° sind, entsprechen. Der Reflexionsgrad R8 ist das Verhältnis des Strahlungsflusses, der in einem gegebenen Kegel reflektiert wird, dessen Spitze auf der betrachteten Oberfläche liegt, zu demjenigen, der in der gleichen Richtung durch den perfekten Reflektierdiffusor reflektiert wird, der bestrahlt wird. Der Strahlungsfluss ist eine Leistung, die in Form von Strahlung emittiert, übertragen oder empfangen wird. Die Einheit des Strahlungsflusses ist das Watt (W). Ein perfekter Reflektierdiffusor ist ein idealer isotroper Diffusor mit einem Reflexionsgrad (oder einem Transmissionsgrad) gleich 1. Die Gewichtungsfunktionen Wx8, Wy8 und Wz8 sind die Produkte der relativen spektralen Leistungsverteilung P8 und einem bestimmten Satz von CIE-Farbanpassungsfunktionen x8, y8 und z8.The relative spectral power distribution P 8 is the spectral power per constant interval wavelength over the entire spectrum relative to a fixed reference value. The CIE color matching functions x 8 , y 8 and z 8 are the functions x (8), y (8) and z (8) in the CIE-1931 colorimetric standard system or the functions x 10 (8), y 10 (8) and z 10 (8) in the standard CIE-1964 colorimetric system. The CIE-1931 colorimetric standard observer is an ideal observer, whose color matching properties correspond to the CIE color matching functions between 1 ° and 4 ° fields, and the CIE 1964 standard colorimetric observer is an ideal observer whose color matching properties match the CIE color matching functions for field sizes, which are greater than 4 °, correspond. The reflectance R 8 is the ratio of the radiant flux reflected in a given cone whose peak is on the surface under consideration to that which is reflected in the same direction by the perfect reflection diffuser being irradiated. The radiant flux is a power that is emitted, transmitted or received in the form of radiation. The unit of the radiation flux is the Watt (W). A perfect reflectance diffuser is an ideal isotropic diffuser with a reflectance (or transmittance) equal to 1. The weighting functions Wx 8 , Wy 8, and Wz 8 are the products of relative spectral power distribution P 8 and a particular set of CIE color matching functions x 8 , y 8 and 8 .
Die
Steuerung
Das
alternative System
Obwohl
das Lichtsystem
Andere
Ausführungsbeispiele
des Spektralrückkopplungssteuersystems
Obwohl spezifische Ausführungsbeispiele der Erfindung beschrieben und veranschaulicht wurden, soll die Erfindung nicht auf die so beschriebenen und veranschaulichten spezifischen Formen oder Anordnungen von Teilen beschränkt sein. Der Schutzbereich der Erfindung soll durch die hieran angehängten Ansprüche und ihre Äquivalente definiert sein.Even though specific embodiments of Invention have been described and illustrated, the invention not to the specific ones so described and illustrated Shapes or arrangements of parts be limited. The protection area The invention is achieved by the claims appended hereto and their equivalents be defined.
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/798,010 US7009343B2 (en) | 2004-03-11 | 2004-03-11 | System and method for producing white light using LEDs |
US10798010 | 2004-03-11 |
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DE102005001685A1 true DE102005001685A1 (en) | 2005-09-29 |
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DE200510001685 Withdrawn DE102005001685A1 (en) | 2004-03-11 | 2005-01-13 | System and method for generating white light using LEDs |
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US (1) | US7009343B2 (en) |
JP (1) | JP2005259699A (en) |
CN (1) | CN1668158B (en) |
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EP1893003A1 (en) * | 2006-08-22 | 2008-02-27 | Christian Möllering | Device for controlling a lamp comprising LEDs of at least four different colours |
US7513671B2 (en) | 2006-09-18 | 2009-04-07 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Efficient solid state light source for generating light in a limited region of the color space |
DE102007059131A1 (en) * | 2007-12-07 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Method and arrangement for setting a color location and luminous system |
DE102007059130A1 (en) * | 2007-12-07 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Method and arrangement for setting a color location and luminous system |
DE102009056463A1 (en) * | 2009-12-01 | 2011-06-09 | Ledon Lighting Jennersdorf Gmbh | Light emitting device, has wavelength converting element, where spectrum of device is set such that normal of surface of element forms angle of specific degrees with symmetry axis of direction of light emitted by LED |
DE202012003936U1 (en) * | 2012-04-18 | 2013-07-22 | Oase Gmbh | lighting system |
DE102008015712B4 (en) * | 2007-03-26 | 2017-04-13 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Light source with several white LEDs with different output spectra |
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---|---|---|---|---|
US7064740B2 (en) * | 2001-11-09 | 2006-06-20 | Sharp Laboratories Of America, Inc. | Backlit display with improved dynamic range |
US7005679B2 (en) * | 2003-05-01 | 2006-02-28 | Cree, Inc. | Multiple component solid state white light |
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US7460196B2 (en) * | 2002-09-25 | 2008-12-02 | Lg Displays Co., Ltd. | Backlight device for liquid crystal display and method of fabricating the same |
US6637905B1 (en) * | 2002-09-26 | 2003-10-28 | Agilent Technologies, Inc. | Method and system for providing backlighting utilizing a luminescent impregnated material |
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US7312560B2 (en) * | 2003-01-27 | 2007-12-25 | 3M Innovative Properties | Phosphor based light sources having a non-planar long pass reflector and method of making |
-
2004
- 2004-03-11 US US10/798,010 patent/US7009343B2/en not_active Expired - Lifetime
-
2005
- 2005-01-13 DE DE200510001685 patent/DE102005001685A1/en not_active Withdrawn
- 2005-02-06 CN CN2005100072886A patent/CN1668158B/en not_active Expired - Fee Related
- 2005-03-09 JP JP2005065950A patent/JP2005259699A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1893003A1 (en) * | 2006-08-22 | 2008-02-27 | Christian Möllering | Device for controlling a lamp comprising LEDs of at least four different colours |
US7513671B2 (en) | 2006-09-18 | 2009-04-07 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Efficient solid state light source for generating light in a limited region of the color space |
DE102008015712B4 (en) * | 2007-03-26 | 2017-04-13 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Light source with several white LEDs with different output spectra |
DE102007059131A1 (en) * | 2007-12-07 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Method and arrangement for setting a color location and luminous system |
DE102007059130A1 (en) * | 2007-12-07 | 2009-06-10 | Osram Gesellschaft mit beschränkter Haftung | Method and arrangement for setting a color location and luminous system |
US8593446B2 (en) | 2007-12-07 | 2013-11-26 | Osram Gesellschaft Mit Beschraenkter Haftung | Method and arrangement for adjusting a color location, and illumination system |
US8593481B2 (en) | 2007-12-07 | 2013-11-26 | Osram Gesellschaft Mit Beschraenkter Haftung | Method and arrangement for setting a color locus, and luminous system |
DE102009056463A1 (en) * | 2009-12-01 | 2011-06-09 | Ledon Lighting Jennersdorf Gmbh | Light emitting device, has wavelength converting element, where spectrum of device is set such that normal of surface of element forms angle of specific degrees with symmetry axis of direction of light emitted by LED |
DE202012003936U1 (en) * | 2012-04-18 | 2013-07-22 | Oase Gmbh | lighting system |
Also Published As
Publication number | Publication date |
---|---|
JP2005259699A (en) | 2005-09-22 |
CN1668158B (en) | 2010-10-27 |
US7009343B2 (en) | 2006-03-07 |
US20050200295A1 (en) | 2005-09-15 |
CN1668158A (en) | 2005-09-14 |
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